No clue what this is growing

[RoOfDiVr]

Just wondering if anyone might know what this green and white things are that are growing on these rocks

 

[mr_X]

Well, you have some briopsis, razor caulerpa, and some feather caulerpa visible. I don't see any white things. Perhaps some tube worms.

 

[RoOfDiVr]

Will they hurt anything?

 

[mr_X]

The algae can be pretty invasive. If the white things are tube worms, they are harmless.

 

[RoOfDiVr]

Thx Mr X just read up on it and they won't hurt anything for the most part